A kind of treatment method of coal chemical industry washing wastewater

A treatment method, coal chemical technology, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of high concentration of organic matter, incomplete degradation, poor biodegradability, etc. Low concentration, good for complete degradation and fast filtration

Active Publication Date: 2022-05-03
神美科技有限公司
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the treatment process of high-concentration COD and ammonia nitrogen wastewater in the coal chemical industry, the present invention provides a treatment method for the washing wastewater of the coal chemical industry, which mainly solves the problems of high organic matter concentration, high ammonia nitrogen concentration, poor biodegradability and degradation in the coal chemical industry washing wastewater. Incomplete question

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of treatment method of coal chemical industry washing wastewater
  • A kind of treatment method of coal chemical industry washing wastewater
  • A kind of treatment method of coal chemical industry washing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Magnetic flocculation precipitation

[0029] Adjust 10L of waste water to pH 8 with sodium hydroxide, then add 6g of polyaluminum chloride to it, and add 2g of magnetic powder at the same time to make it integrate with pollutant flocculation and produce a large number of flocculent alum flowers. After settling for 5 minutes, filter and separate , The magnetic powder is recycled and reused, the sludge is treated as solid waste, and the filtrate is processed in the next step. After testing, the COD concentration in the filtrate was 5073mg / L, the BOD concentration was 1317mg / L, the ammonia nitrogen concentration was 330mg / L, and the pyridine concentration was 47.9mg / L. The corresponding removal rates of the first three were 8.15%, 3.52%, and 8.84%, respectively.

[0030] 2. UV-activated persulfate oxidation

[0031] In the filtrate that step 1 obtains, add sulfuric acid to adjust pH to 3, then in intensity 9mW / cm 2Sodium persulfate was added under ultraviolet light, s...

Embodiment 2

[0041] 1. Magnetic flocculation precipitation

[0042] Adjust 10L of waste water to pH 8 with sodium hydroxide, then add 2g of polyaluminum chloride to it, and add 1g of magnetic powder at the same time to make it flocculate and combine with pollutants to form a large amount of flocculent alum flowers. After settling for 15 minutes, filter and separate , The magnetic powder is recycled and reused, the sludge is treated as solid waste, and the filtrate is processed in the next step.

[0043] 2. UV-activated persulfate oxidation

[0044] In the filtrate that step 1 obtains, add sulfuric acid to adjust pH to 3, then in intensity 9mW / cm 2 Sodium persulfate was added under ultraviolet light to make the concentration of sodium persulfate in the filtrate 1.5mmol / L, and the reaction was stirred and reacted at 100r / min for 20min.

[0045] 3. Photoelectric-Fenton oxidation

[0046] The filtrate treated in step 2 was adjusted to pH 4 with sodium hydroxide, and then Na was added 2 SO ...

Embodiment 3

[0048] 1. Magnetic flocculation precipitation

[0049] Adjust 10L of waste water to pH 8 with sodium hydroxide, then add 8g of polyaluminum chloride to it, and add 5g of magnetic powder at the same time to make it flocculate and combine with pollutants to form a large amount of flocculent alum flowers. After settling for 10 minutes, filter and separate , The magnetic powder is recycled and reused, the sludge is treated as solid waste, and the filtrate is processed in the next step.

[0050] 2. UV-activated persulfate oxidation

[0051] In the filtrate that step 1 obtains, add sulfuric acid to adjust pH to 4, then in the intensity of 11mW / cm 2 Sodium persulfate was added under ultraviolet light, so that the concentration of sodium persulfate in the filtrate was 1.0 mmol / L, and the reaction was stirred and reacted at 100 r / min for 40 min.

[0052] 3. Photoelectric-Fenton oxidation

[0053] The filtrate treated in step 2 was adjusted to pH 3 with sodium hydroxide, and then Na ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a treatment method for coal chemical washing wastewater, which firstly strengthens the flocculation effect through magnetic flocculation precipitation, partially removes tars, suspended impurities and other macromolecular substances in the wastewater, and then activates persulfate oxidation through ultraviolet light to activate Generate sulfate radicals, which can effectively decompose refractory organics such as pyridine and quinoline into easily degradable substances such as propenyl alcohol and acetamide, thereby improving the removal rate of refractory organics and improving the biodegradability of wastewater; Oxidation method, using electrochemical method to produce Fenton's reagent to treat wastewater, while introducing ultraviolet light, ultraviolet light and Fe 2+ to H 2 o 2 The catalytic decomposition has a synergistic effect, the decomposition rate is greatly improved, it can effectively treat refractory organic matter, the degree of mineralization is high, no secondary pollution is generated, and the operation is simple. The control parameters are only voltage and current, which is convenient for automatic control.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment method for coal chemical industry washing wastewater with high organic matter concentration, high ammonia nitrogen concentration and poor biodegradability. Background technique [0002] Coal chemical industry is an industry that chemically processes coal to produce gas, liquid and other related bodies. Due to the difference between the production process and the final product, the wastewater discharged by coal chemical enterprises mainly comes from the four aspects of coking, gasification, liquefaction and calcium carbide, among which there are many washing wastewater with high toxicity and high concentration, containing a large amount of Toxic and harmful substances such as phenol, cyanide, oil, ammonia nitrogen, etc. COD in wastewater is generally about 5000mg / L, ammonia nitrogen is 200-500mg / L, and the biodegradability is poor. Organic po...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/12C02F101/30
CPCC02F9/00C02F1/5245C02F1/4672C02F1/32C02F1/488C02F2101/30
Inventor 郑搏英庞宏磊崔秀菊张襄丁海静
Owner 神美科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap